ZiLOG Z08617 Manual

FEATURES
Low Power Consumption - 750 mW
32 Input/Output Lines
Digital Inputs NMOS Levels with
Internal Pull-Up Resistors
4 Kbytes ROM
Four Direct Connect LED Drive Pins
124 Bytes of RAM
GENERAL DESCRIPTION
The Z08617 Keyboard Controller is a member of the
®
Z8 single-chip microcontroller family with 4 Kbytes
of ROM. The device is housed in a 40-pin DIP package,
and is manufactured in NMOS technology. The Z08617
microcontroller offers fast execution, efficient use of
memory, sophisticated interrupt, input/output bit-
manipulation capabilities, and easy hardware/soft-
ware system expansion along with low cost and low
power consumption.
The Z08617 architecture is characterized by a flex-
ible I/O scheme, an efficient register, I/O, and a
number of ancillary features that are useful in many
industrial and advanced scientific applications.
For applications which demand powerful I/O capabili-
ties, the Z08617 provides 32 pins dedicated to input
and output. These lines are grouped into four ports,
each port consists of 8 lines, and are configurable
under software control to provide timing, status
signals, and serial or parallel I/O ports.
DS96KEY0300
C P
USTOMER ROCUREMENT
S
PECI F I C A TI O N
Z08617
NMOS Z8 ® 8-B MCU
IT
K C
EYBOARD ONTROLLER
Hardware Watch-Dog Timer (WDT)
Two Programmable 8-Bit Counter/Timers,
Each with 6-Bit Programmable Prescaler
Six Vectored, Priority Interrupts from
Six Different Sources
On-Chip RC Oscillator
Clock Frequency: Up to 5MHz
Low EMI Emission
The Z08617 offers low EMI emission which is achieved
by means of several modifications in the output
drivers and clock circuitry of the device.
There are two basic address spaces which are avail-
able to support this wide range of configurations:
Program Memory and 124 General-Purpose Registers.
The Z08617 offers two on-chip counter/timers with
a large number of user-selectable modes. This unbur-
dens the program from coping with real-time prob-
lems such as counting/timing (Figure 1).
Notes:
All Signals with a preceding front slash, "/", are active Low,
e.g., B//W (WORD is active Low); /B/W (BYTE is active Low,
only).
Power connections follow conventional descriptions below:
Connection
Power
Ground
®
Z08617 NMOS Z8 8-B
K C
EYBOARD ONTROLLER
Circuit Device
V V
CC DD
GND V
SS
MCU
IT
1